fix(web): add Nav/Footer to orphaned pages, remove dead language button (#1018)

/changelog, /cloud, and /demo/contracts rendered no Nav or Footer -
landing directly on any of them (e.g. via the footer's own "Live demo"
link) left no way back into the site but the browser back button.

DocNavbar's "EN" language-selector button had no onClick and no
supporting i18n infrastructure anywhere in the repo - purely decorative,
implying locale support that doesn't exist. Removed it and the now-unused
GlobeIcon.

Also fixed a stale Footer comment claiming six published packages;
NPM_PACKAGES lists four.

Co-authored-by: Salmatcre8 <118213044+Salmatcre8@users.noreply.github.com>

Author: determined-001

apps/web/app/changelog/page.tsx

@@ -1,32 +1,38 @@
-import fs from 'fs';
-import path from 'path';
-import ReactMarkdown from 'react-markdown';
-import remarkGfm from 'remark-gfm';
-import rehypeSlug from 'rehype-slug';
-import rehypeAutolinkHeadings from 'rehype-autolink-headings';
-import type { Metadata } from 'next';
+import fs from "fs";
+import path from "path";
+import ReactMarkdown from "react-markdown";
+import remarkGfm from "remark-gfm";
+import rehypeSlug from "rehype-slug";
+import rehypeAutolinkHeadings from "rehype-autolink-headings";
+import type { Metadata } from "next";
+import Nav from "@/components/Nav";
+import Footer from "@/components/Footer";
 
 export const metadata: Metadata = {
-  title: 'Changelog',
-  description: 'Project changelog',
+  title: "Changelog",
+  description: "Project changelog",
 };
 
 async function getChangelog(): Promise<string> {
   // `CHANGELOG.md` lives at the repo root; the Next app runs from `apps/web`.
-  const filePath = path.join(process.cwd(), '..', '..', 'CHANGELOG.md');
-  return await fs.promises.readFile(filePath, 'utf8');
+  const filePath = path.join(process.cwd(), "..", "..", "CHANGELOG.md");
+  return await fs.promises.readFile(filePath, "utf8");
 }
 
 export default async function ChangelogPage() {
   const markdown = await getChangelog();
   return (
-    <section className="prose prose-sm max-w-3xl mx-auto py-8">
-      <ReactMarkdown
-        remarkPlugins={[remarkGfm]}
-        rehypePlugins={[rehypeSlug, [rehypeAutolinkHeadings, { behavior: 'wrap' }]]}
-      >
-        {markdown}
-      </ReactMarkdown>
-    </section>
+    <>
+      <Nav />
+      <section className="prose prose-sm max-w-3xl mx-auto py-8">
+        <ReactMarkdown
+          remarkPlugins={[remarkGfm]}
+          rehypePlugins={[rehypeSlug, [rehypeAutolinkHeadings, { behavior: "wrap" }]]}
+        >
+          {markdown}
+        </ReactMarkdown>
+      </section>
+      <Footer />
+    </>
   );
 }